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RT600 Datasheet(PDF) 143 Page - NXP Semiconductors |
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RT600 Datasheet(HTML) 143 Page - NXP Semiconductors |
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143 / 171 page ![]() RT600 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors B.V. 2024. All rights reserved. Product data sheet Rev. 2.2 — 25 January 2024 143 of 173 NXP Semiconductors RT600 Dual-core microcontroller with 32-bit Cortex-M33 and Xtensa HiFi4 Audio DSP CPUs 16.5 XTAL oscillator In the XTAL oscillator circuit, only the crystal (XTAL) and the capacitances CX and Cy need to be connected externally on XTALIN and XTALOUT. See Figure 35 “XTAL oscillator connection - Low-Power Mode”. For best results, it is very critical to select a matching crystal for the on-chip oscillator. Load capacitance (CL), series resistance (RS), and drive level (DL) are important parameters to consider while choosing the crystal. After selecting the proper crystal, the approximate external load capacitor Cx and Cy values can also be generally determined by the following expression: Cx = Cy = 2CL - CPad - 2CSTRAY Where: CL - Crystal load capacitance CPin - Pad capacitance of the XTALIN and XTALOUT pins (~3 pf per pin). Fig 35. XTAL oscillator connection - Low-Power Mode Fig 36. XTAL oscillator connection - High Gain Mode Crystal Cy Cx XTALIN OSC Module XTALOUT Vss Rs Crystal Cy Cx XTALIN OSC Module XTALOUT Vss Rs Rf |
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